Allegro中等长线或差分线设置的一些方法

1、以千兆以太网为例说明，差分等长设置；打开约束管理器，创建BUS（也可以再拉线之前创建，个人习惯拉线前设好所有的总线BUS）;Selections:NameTypeBusMDI0+NetMDIO-NetMDI1+Net-MDI1-NetMDI2+NetMHI2-NptM(4MDT1Na.meU12.1From:TolTypEETnleranrHu1aMan,e:ALLDRVRS/RCVRSDRIVER/RECEIVERLONGESTU12.110U13.110DeltaTRu1eEdi/ifingGlobalVLengthVCl.DOMILLengthVio|1MD2+MD2-MD3+MD3-M

2、DIO+MDIO*MDIO+驱动之后的busMDIO+MDIO+MDIO+CPl2-2：U13.2O日MDI1+日MDI1-MDIO+MDIO+MDIO+日MDI3-MDIO+AD1AD3AD4ARX+A7X+GPOOLADOMAOMA4MCASMCSOMDI0+_2MDQSOMDOMODTOMSDCLK+MSDCLK-RXIN+USBDO+(p12.4:U13T日MDI2+_f(JT2.7:U13.145HMDIg-日MDI3+实际上就是QJ12.1O:U13.19MDI0+日IV1DMDI1MDIO-MDI1+MDI1-MDI2-王郃延坪锂列MDI3+就OK!MDI3-田BUSMDI2田B

3、USPCI031田BUS_PD_DATA*田ARX田ATX田DP1田DP7田DP8田DP9田DP1O田DP12田LUSBDO日BUS_MDI_1日MDIO+CU12-1：U13.1日MDIO-1U12.2:U13.2MDIOU12.3:U13.5MDI1+U12.4:U13.6MDI1-驱动后的U12.7:U13.14NIDI2+MG，令堆U12.8:U13.15MDI2-1*1w;jTU1U12.9:U13.18MDI3+U12.10:U13.19MDI3-田MG_ARX田MGATXAnalyzeF9SelectDeselectFind.Bookmark.ExpandAltCollapseA

4、lt-Cr亡at亡日CPUBOARD日MDMDI1U12.1:U13.1MDI0+Global0MIL25MIL厂U12.2:U13.2MDIOGlobal0MIL25MILU12.3:U13.5MDI1+Global0MIL25MILU12.4:U13.6MDI1-Global0MIL25MILU12.7:U13.14MDI2+Global0MIL25MILU12.8:U13.15MDI2-Global0MIL25MILU12.9:U13.18MDI3+Global0MIL25MILU12.10:U13.19MDI3-mMradvGlobal0MIL25MIL中MGDD曲M差分的对内等长设置

5、；TarDP7田MAO田MAO田MA2MAO田MAO田MA4田田田田MA4田MA0田MAOMA0MA0MA0MA0丿CPUBOARD|MODTOMCASMSDCLK+MCASMCASMAOMCSOMCSOMODTO田MA10田MA11田MA12田MA13田MBAO田MBA1田MBA2田MCAS田MCKE田MCSO田MCS1田MODTO可以看到，在DDR2的ACBUS-M有很多模型田MODT1田MRAS田MSDCLK+田MSDCLK-田MWEUncoupledLengtlObjectsLengthIgnoredGatherControl参照以上做法!然后mReferencedElectrical

6、CSet具有相同模型）可以同模型会自动显示红lemberShip到之前创建+DRC-已ElectricalCons+笄SignalInteg+笄Timing-匿Routing肆Wiring肆Impedar肆Min/Max肆TotalEtc肆Differenti甘Relative+笄AllConstrair-已Net+笄SignalInteg+笄Timing-BRouting肆WiringMDI0+MDI0+MDI0+MDI0+MDI0+MDI0+MDI0+PinDelayPJ日CPU_BOARD田BUS_DDR2_AC田BUS田BUS田BUS日BUS色,把显示红色的clear掉规

7、则，设置点对点的PINpair,白的mgm可，等长范围手动添加。t点对点或riSjBUS_PCI_0_31业模型；一般选择使用相同模型最多的一根做模型创建MG；驱动后其他信号等DDR2DATAGPLADMDI_1MDI0+MDIO-MDI1+MDI1-LIDI2+MDI2-MDI3+日BUS卫DR2AC日MSDCLK+U1.B9:U5.E8日MSDCLK-FinPairUl.E9:U5.E8U1.A9:U5.F日MWE田MCS1U1.B9:U2.E8.U1.B9:U3.E8U1.B9:U4.EtfU1.C13:U2.F3U1.C13:U3.F3U1.A9:U2.F+U1.A9:U3.F8U1.A9:U4.F0*田MA12田MA13田MBAO田MBA1田MBA2田MCAS田MCKE田MC